Tuesday, July 9, 2013

1307.2067 (Tetsuya Katayama et al.)

Properties of dense, asymmetric nuclear matter in
Dirac-Brueckner-Hartree-Fock approach

Tetsuya Katayama, Koichi Saito
Within the Dirac-Brueckner-Hartree-Fock approach, using the Bonn potentials, we investigate the properties of dense, asymmetric nuclear matter and apply it to neutron stars. In the actual calculations of the nucleon self-energies and the energy density of matter, we study in detail the validity of an angle-averaged approximation and an averaging of the total momentum squared of interacting two-nucleons in nuclear matter. For practical use, we provide convenient parametrizations for the equation of state for symmetric nuclear matter and pure neutron matter. We also parametrize the nucleon self-energies in terms of polynomials of nucleon momenta. Those parametrizations can accurately reproduce the numerical results up to high densities.
View original: http://arxiv.org/abs/1307.2067

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